Building Technology 1 took us through the start to finish process of designing a residential house. The goal for our house was to make the building as energy efficient as possible. This governed our choice of materials, the direction and size of windows and openings, even to the type of roofing that can accommodate solar panels. When a designer is able to keep the selection of building materials and building practices focused on energy efficiency, this creates buildings that have less green house gas emissions, use less natural gas and electricity and overall have a smaller environmental footprint.